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v3.21.1

Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Mar. 17, 2021 | Feb. 27, 2021 | Feb. 29, 2020 | Feb. 27, 2021 | Feb. 29, 2020
Subsequent Event [Line Items] |  |  |  |  |
Dividends paid per common share (in dollars per share) |  | $ 0.12 | $ 0.11 | $ 0.24 | $ 0.22
Deferred FICA liability |  | $ 16.2 |  | $ 16.2 |
Refundable tax credit |  | 4.0 |  | 4.0 |
Refundable tax credit, outstanding |  | $ 3.2 |  | $ 3.2 |
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Dividends paid per common share (in dollars per share) | $ 0.12 |  |  |  |

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